/Engine/Source/Developer/Virtualization/Public/IVirtualizationBackend.h
Note that virtualization backends are instantiated FVirtualizationManager viaIVirtualizationBackendFactoryso each new backend derived fromIVirtualizationBackendwill also need a factory derived fromIVirtualizationBackendFactory. You can either do this manually or use the helper macro 'UE_REGISTER_VIRTUALIZATION_BACKEND_FACTORY' to generate the code for you.
class IVirtualizationBackend